TY - JOUR
T1 - Effects of Flexible Induction Coil Pitch on the Heating Performance of Thermotherapy Needles
AU - Chang, Chia Jung
AU - Tai, Cheng Chi
AU - Lin, Fang Wei
AU - Kuo, Chung Ching
AU - Hung, Chia Ming
N1 - Funding Information:
Manuscript received October 2, 2019; revised April 11, 2020; accepted May 12, 2020. Date of publication May 28, 2020; date of current version October 9, 2020. This work was supported in part by National Cheng Kung University and in part by the Metal Industries Research and Development Center, Taiwan. The Associate Editor coordinating the review process was José Pereira. (Corresponding author: Cheng-Chi Tai.) The authors are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan (e-mail: [email protected]).
Publisher Copyright:
© 1963-2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - This article presents a newly developed flexible laminated copper (FLC) coil for electromagnetic thermotherapy that has several advantages over traditional hard copper coils. We study the effect of pitch (the distance between coil turns) on the heating performance of the proposed FLC coil. The flexible coil can be wound into different shapes for various purposes. However, the output power of the heating system can be substantiality affected by the coil inductance. This study is aimed at reducing coil inductance by changing the original flexible coil diameter and pitch in order to enhance the output power of a high-frequency machine, improve treatment, and meet the actual heating requirements. The results of the experiments show that the temperature is six times better when using the flexible coil compared with when using the traditional hard copper coil, where adjusting the coil pitch can increase the needle temperature by a maximum of 48.3 °C in pork liver tissue. In addition, this study simulates the distribution of the magnetic field of the flexible coil via a finite element analysis and explores the coil design and heating effect of metal needle heating and liver tissue ablation. The improved features of this proposed method are threefold: 1) the flexible coil can be used to treat different zones of the human body; 2) the flexible coil exhibits better heating performance than a hard copper coil; and 3) the coil inductance is lowered, and the power is improved, which, in turn, leads to better treatment and meets the actual heating requirements.
AB - This article presents a newly developed flexible laminated copper (FLC) coil for electromagnetic thermotherapy that has several advantages over traditional hard copper coils. We study the effect of pitch (the distance between coil turns) on the heating performance of the proposed FLC coil. The flexible coil can be wound into different shapes for various purposes. However, the output power of the heating system can be substantiality affected by the coil inductance. This study is aimed at reducing coil inductance by changing the original flexible coil diameter and pitch in order to enhance the output power of a high-frequency machine, improve treatment, and meet the actual heating requirements. The results of the experiments show that the temperature is six times better when using the flexible coil compared with when using the traditional hard copper coil, where adjusting the coil pitch can increase the needle temperature by a maximum of 48.3 °C in pork liver tissue. In addition, this study simulates the distribution of the magnetic field of the flexible coil via a finite element analysis and explores the coil design and heating effect of metal needle heating and liver tissue ablation. The improved features of this proposed method are threefold: 1) the flexible coil can be used to treat different zones of the human body; 2) the flexible coil exhibits better heating performance than a hard copper coil; and 3) the coil inductance is lowered, and the power is improved, which, in turn, leads to better treatment and meets the actual heating requirements.
UR - https://www.scopus.com/pages/publications/85092723818
UR - https://www.scopus.com/pages/publications/85092723818#tab=citedBy
U2 - 10.1109/TIM.2020.2998302
DO - 10.1109/TIM.2020.2998302
M3 - Article
AN - SCOPUS:85092723818
SN - 0018-9456
VL - 69
SP - 8983
EP - 8991
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
IS - 11
M1 - 9102985
ER -